<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <title>Document</title>
  </head>
  <body>
    <!-- 准备好一个容器 -->
    <div id="test"></div>

    <!-- 引入react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom, 用于支持react操作DOM -->
    <script
      type="text/javascript"
      src="../js/react-dom.development.js"
    ></script>
    <!-- 引入babel, 用于将jsx转为js -->
    <script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">
      //创建组件
      class Demo extends React.Component{
        //展示左侧输入框的数据
        showData = ()=>{
          const {input1} = this.refs
          alert(input1.value)
        }
        //展示右侧输入框的数据
        showData2 = ()=>{
          const {input2} = this.refs;
          alert(input2.value)
        }
        //展示右侧输入框的数据

        render(){
          return (
            <div>
              <input ref="input1" type="text" placeholder="点击按钮提示数据"/>&nbsp;
              <button onClick={this.showData}>点我提示左侧的数据</button>&nbsp;
              <input ref="input2" onBlur={this.showData2} type="text" placeholder="失去焦点提示数据"/>  
            </div>
          )
        }
      }

      ReactDOM.render(<Demo/>,document.getElementById('test'))
    </script>
  </body>
</html>
